Trouble, if you can not support me (solve the problems), I will get the money back.

I didn't have any errors before installing SPPB. The Joomla ran perfectly on XAMPP and WWW. I had first tested in WWW with SPPB got these errors as described and then on test in XAMMP. So your answers are of no use to me. I also worked with the php.ini and .user based on your suggestions on the homepage and adjusted it, all without success. If you sell such editors and write that they run on Joomla 4 .... then I expect that too, without having to fiddle around with parameters so heavily here and there. If you cannot offer me a quick solution, then I will have to do without the SPPB. Then please send me the money back. Thanks.